/* Copyright  2009
   @Author
   Richard Changde Yin            e-mail yinchangde@hotmail.com

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
   
/**
 * @filename: item/empty_string.h
 */ 
#ifndef COLLAPSAR_ITEM_EMPTRY_STRING_H
#define COLLAPSAR_ITEM_EMPTRY_STRING_H

/**
  Item_empty_string -- is a utility class to put an item into List<Item>
  which is then used in protocol.send_fields() when sending SHOW output to
  the client.
*/

#include <item/string.h>

class Item_empty_string :public Item_string
{
public:
  Item_empty_string(const char *header,uint32_t length, 
                    const CHARSET_INFO * cs= NULL) :
    Item_string("",0, cs ? cs : &my_charset_utf8_general_ci)
    { name=(char*) header; max_length= cs?length * cs->mbmaxlen : length; }
  void make_field(Send_field *field);
};
  
#endif /* COLLAPSAR_ITEM_EMPTRY_STRING_H */
